实验心理学实验报告-信号检测论evalute_method.doc

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1、ExperimentReportName:曾翘楚Major:PsychologyNo:2012213970Reporttime:4.28Signaldetectiontheory–evaluatemethod1.Introduction1.1ExperimentobjectiveLearnthesignaldetectiontheoryandevaluatemethodwhichisoneofitsbasicprocessesbyrecognizepicture.1.2ExperimentcontentSignaldetectionthe

2、oryisanimportantbranchofinformationtheory.Itcanmeasurenotonlypeople’sreactionofsignalstimulate,butalsonoisesimulate.Thus,itcandistinguishsensitivityfromcriterionofjudgmentandexpressthemindifferentdata.1.3ExperimentmeaningAmericanpsychologistsW.P.TannerandJ.A.Swetsusesigna

3、ldetectiontheoryintheprocedureofhuman’sperceptionwhichledpsychologicalphysicstoanewperiod.Evaluatemethodisabasicexperimentprocess.Forevaluatemethod,participantsarerequiredtodeterminewhetherthereissignalornot,atthesametime,theyhavetoevaluatetheirchoiceaccordingtoacertaincl

4、ass,thatishowmuchdegreearetheysureabouttheirdecision.Comparedwiththeothermethodofsignaldetectiontheory,usingevaluatemethodcanobtainmoreinformationofparticipantatthesametime.Wecangetmorethantwocriteria,andinthatcase,wecandrawROClinesafteroneexperiment.2.Method2.1Subject4co

5、llegestudentsofpsychologydepartmentinCentralChinaNormalUniversityattheageof19to21.Allparticipantsarenormalintelligenceandmemory.Twostudentsamongthemarefemale.2.2EquipmentormaterialTwosetsofpicturesandonesetincludes60differentpictureswhichisusedassignal;theothersetincludes

6、60differentpictureswhichissimilartothefirstsetisusedasnoise.Psykeyprocedure.Keyboardsandcomputers.2.3DesignThisiswith-insubjectdesign.Participantsarerequiredtojudgethepicturedisplayedonscreenhadbeenrememberbeforeandthenevaluatetheconvincedegree.2.4Procedure1.Theinstructio

7、nofexperimentwillshowonthescreen.1.Intheprocessofremember,60signalswillbedisplayedrandomlyonebyone,andparticipantsneedtorememberthesepicturesascorrectaspossible.2.Afterthat,wewillenterintotheprocessofjudgment.Inthispart,bothsignalsandnoisewillbemixedanddisplayedrandomlyon

8、ebyone.Participantsareaskedtojudgethatwhetherthepictureissignalornotandhowmuchdegreedotheycertai